Automatic web-guiding device.



W. I. LEWIS.

AUTOMATIC WEB GUIDING DEVICE.

. APPLICATION FILED FEB. I3, I911. 1,33,5K. Patented July 10, 1917.

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AUTOMATIC WEB GUIDING DEVICE. APPLICATION FILED FEB- 1-3. 1911.

Patented July 10, 1917.

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AUTOMATIC WEB GUIDING DEVICE.

APPLICATION FILED FEB-13,1911.

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@ WAMWSSNCW Czq'orney.

WILLARD I. LEWIS, OF WALPOLE, MASSACHUSETTS.

AUTOMATIC WEB-GUIDING DEVICE.

Application filed February 13, 1911.

To all whom it may concern:

Be it known that I, WHLLARD I. LEWIS, a citizen of the United States,residing at Walpole, in the county of Norfolk, State of Massachuse ts,have invented a certain new and useful Improvement in Automatic vVeb-Guiding Devices, of which the following is a specification, referencebeing had therein to the accompanying drawings.

The invention consists in novel. automatic web-guiding devices for usein machines for operating upon continuous webs, and in the combinationof the same with an elastic tentering machine. Also, in means for opening out the selvages of a web as it is fed into a machine to be operatedupon. Also; in various novel features of construction and combinationsof parts which are described hereinaft r and pointed out in the claims.

An embodiment of the features of the invention in practical form isshown in the drawings, in which Figure 1 is a partly-sectional view ofcertain portions of an elastic tentering machine at the entering end ofthe latter, looking from one side of the machine, with the dif ferentfeatures of the invention combined therewith Fig. 2 is a view lookingfrom the lefthand side in Fig. 1.

Fig. 3 is a view from the right hand side in Fig. 1, with some of theparts at the top in the latter figure omitted.

The drawings represent sufficient of the parts of an elastic tenter, atthe end thereof at which the web of cloth is fed to the travelingendless chains 1, 1, thereof, to render clear the nature, relations, andmode of op oration of the different features of the invention. Thesupporting sprocket-wheels for the said chains which are located at thesaid end are shown at 2, 2, as well as portions of the o].)])ositely-movable sideframes 3, 3, on which the said sprocketwheels andendless chains are mounted. One of the transversely-extending swingingcarriers 4 for the said side-frames is represented. and a portion of thesupporting post or pillar 5 upon the top of which the said carrier lismounted to swing in a horizontal plane about a vertical axis as usual.One of the hand-operated right-and-left screw threaded adjusting shaftsby which the sideframes and chains at the opposite sides of the machineare set nearer together or far thcr apart is shown at G, the hand-wheelsSpecification of Letters Patent.

Patented July 10, 1917.

Serial No. 608,448.

of said shaft being marked 6 6. It is well-known that in machines ofthis class the side-frames and chains are reciprocated endwiselengthwise of the machine, during the operation of the machine, theside-frame and chain at one side of the machine moving in one directionat the same time that those at the other side move in the oppositedirection, and then vice versa.

For the purpose of automatically guiding the selvages or margins of theweb a. of cloth to the chains 1, 1, I employ carriers which engage withthe said selvages or margins and move or travel therewith, the saidcarriers presenting the selvages or margins in proper position forreception by the chains, and delivering the same to the latter, and inconjunction with the said moving or travcling carriers I employdetecting means acting to ascertain the positions of the said selvagesor margins as they advance toward the chains, and automatically adjustthe receiving portions of the carriers into proper relations to theoncoming selvages or margins to receive and engage with the same. Thecarriers and the detecting means may vary in specific character andconstruction. Herein I have shown carriers 7, 7, that are constituted byrotatable wheels, and a detecting and controlling means therefor whichembodies the principles of the corresponding means of my prior LettersPatent No. 678,121, granted July 9, 1901; and No. 905,720, granted Dec.1, 1908. The chief elements of the said detecting and controlling meansare the rotatable detector-roll 8, furnished with radially-movabledetectorpins 9, 9, and with the sleeves 10, 10, which are adjustedlongitudinally upon the supporting-shaft 11 through the agency of thesaid pins and of the cams (shown and described in the said patents) inconnection with the said sleeves, the said detecting roll and itsappurtenances being constructed and arranged to operate substantially asin the Letters Patent just mentioned. As will be understood, thepositions of the sleeves 10,

width of the machine from supports 13, 13.

These supports. are pivotally mounted in connection with sideframes 3,3, so as to be capable of swinging transversely with respect to themachine. Thus, each support 13 is formed with downwardly-extending I Vwith respect to the receiving portion of the adjacent chain 1. In otherwords, the support and'carrier swing about an axis which is' in the sameplane with the delivery-point of the carrier. This is necessary in orderthat there may always be a proper depth of sel'v'age or margin of theweb taken hold of by the engaging members of the links of each chain. Ifthe swinging movement of the support and carrier involved lateraldisplacement of the delivery-portion of the periphery of the carrierwith relation to the chain, the depth of selvage or margin engaged bythechain would be varied. The said delivery-point of the carrier also is arranged close to the point at which the chain receives andbecomes'engaged with the sel- Vag'e or margin as the latter leaves thecarrier 7 The receiving-point on the carrier 7 likewise is located closeto the point at which the web leaves the detector-roll. For

7 the purpose of-enabling the detector-devices to automatically adjustthe receiving portions of the two carriers so as to maintain =suchportions at all times in the positions required by the oncoming portionsof the ,7 ted to receive a pin 20 projecting from the upper portion ofthe corresponding swing ing support 13. By means of the saidrextensionlS, arm 19, and pin 20, the support 13 and carrier 7 are swungautomatically in unison with variations in the position of thecorresponding selvage or margin toward or from the middle of the widthof the machine, so that the receiving-point or the pe riphery of thecarrier is always maintained in proper position relative to the saidselvage or margin. In order thatthe said correspondence may be attainedthe more correctly, the pin 20 islocated in the same plane with thereceiving-point on the periphery of the carrier. Hence the position ofthe said receiving-point transversely of the machine always correspondsexactly with that of arm 19, and that is determined with precisionthrough the action of the dctector-roll to accord with the position ofthe selvage or margin itself. Extension 18 is supported by means of atube 21, extending across the machine and supported by portions of thefixed frame-work of the latter, the said extension being forked toembrace and slide upon the said fixed tube. To provide for relativeadjustment of the arm 19 transversely of the machine with relation tothe extension 18, so as to enable the receiving-portion of carrier 7 tobe brought into different working relations with relation to the camwithin the detector-roll, and to the selvages or margins of the web, thesaid arm is combined with the extension by means of an adjusting screw22. By turning the said screw the arm may be shifted transversely of themachine relative to the said extension and cam to the extent required.Thereby it is made possible to adjust the extent to which the selvage ormargin of the web is entered into the grasp of the clips of thecorresponding chain.

The detector-roll is mounted upon fixed supports, but the respectivecarriers 7, 7, have a movement in the direction of the length of thecloth. Each carrier accompanies the bodily movement of the correspondingchain and side-frame. This is necessary in order that the longitudinaltension on each selvage or margin of the web may remain uniform, becausethe selvage or margin would fly out of the clips of the chain if therewere looseness between the delivery portion of a carrier 7 and thereceiving clips. To provide for thesaid movement, the supports 13 forthe said carriers are mounted upon the longitudinallyreciprocatingside-frames. This has been explained. In order to keep the clothuniformly taut, each stand 17 supporting a support 13 is longitudinallyslotted at 23,23,

.for the passage of the bolts 21, 24, which.

hold it in place upon the correslmnding sideframe, the slots providingfor a certain amount of movement of the stand independently of theside-frame in the direction of the length of the machine. Each stand hasconnected therewith a pull-back chain, strap, or cord 25 that passesover a guide-pulley 2(5 and has a weight 27 attached thereto. The

'Weight tends to draw the stand 17, support 13, and carrier 7 backward,while the forward pull of the cloth tends to draw the carrier forwardagainst the pull of the weight. It will be obvious that without thisautomatic taking-up and letting-out or compensating arrangement therewould be an alternating tightening and slackening of the web in regularsuccession as the sideframe and carrier are moved to and fro.

It is well-known that in elastic tentel's the traveling movement of thechains is produced through the agency of driving conrequired.

nections at or near the delivery-end of the machine, such drivingconnections including a transversely -extending shaft which is geared tothe chains, said shaft being mounted upon one of the horizontal-swingingtransverse supports or carriers 4 and being driven through gearingcomprising bevel gear-wheels One of such bevel gear-wheels is disposedin a horizontal plane concentric with the vertical pivot around whichthe said transverse support or carrier l swings, and the other is fixedupon the transverselyextending shaft. The result of this arrangement isthat while the horizontal bevel gear-wheel serves by its rotation totransmit rotation through the second bevel gearwheel to the transverselyextending shaft to cause the chains to travel, there is a regularacceleration of the rate of advance of the chains, succeeded by aretardation, and so on. This is due to the travel of the second bevelgear-wheel back and forth around the horizontal bevel gear-wheel as thesaid support or carrier 1 swings. The swinging movement which causes thesecond bevel gear-wheel to travel around in the direction in which thehorizontal bevel gear-wheel is rotating operates to occasion theretardation, while the travel in the reverse direction occasions theacceleration. I employ means to compensate for this acceleration andretardation. Such means includes a rockshaft 28 which is mounted inhearings in fixed portions of the machine framework at the entering endof the latter. The said rockshaft is rocked in proper timing withrespect to the to-and-fro reciprocating movements of the side-frames andchains, through connections comprising an arm 29 fixed upon therockshaft and extending downward therefrom, and a link 30 having one endthereof engaged with the adjacent trans- VGI'SQlY-GXtQIldlDg swingingsupport or carrier 4. Arm 29 is slotted to permit the point ofconnection of the link 30 therewith to be shifted, so that the extent ofthe rocking movement of the rockshaft may be varied as At each side ofthe middle of the width of the machine, the rockshaft 28 has fixedthereon a downwardly-extending bail 31 of a length somewhat greater thanthe range of ad ustment of the side-frame 3. Upon the rock-shaft withinthe bail 31 is loosely mounted a smaller bail 32, which is capable ofturning upon the rockshaft. This smaller bail 32 carries a roll 33arranged to engage with the longitudinal portion of the outer bail 31.An upwardly-extending portion of this bail 32 has attached to it oneextremity of a flexible connection 3 1-, which preferably is constitutedby a chain. This chain 3-1 extends rearwardly to and partly around aguide 35, constituted by a toothed wheel, and then forward to anextension of the corresponding side-frame 3,

.to which its other end is attached.

The guide 35 is carried by a block 36 which is mounted on shaft 15. Suchguide may be fixed upon the stand 17, but the effect secured is the sameby mounting the block 36 immediately adjacent the rear lug let of theswinging carrier 13, so that the block and lug may make contact witheach other. The action of the weight 27 in drawing the stand 17,swinging support 13, and carrier 7 rearward causes the rear lug 1 1 toengage the block 36 and press the same and the guide 35 rearward,tightening the chain 3st and rocking the smaller bail, 32, uponrockshaft 28 so as to hold the roll 33 in contact with the actin portionof the bail 31. Consequently, each time the said bail 31 is swungrearwardly through its connection with the adjacenttransversely-extending horizontal support or carrier 1, the bail 32 isrocked so as, through chain 3ft, to draw guide 35, block 36, stand 17,swinging support 13, and carrier 7 forward, thereby yielding up the websufiiciently to compensate for an acceleration on the rate of thechains. its the rockshaft 28 is rocked reversely, the chain at isslacked, allowing the weight 27 to operate to produce a relativerearward movement of the parts, including carrier '7, whereby to take upthe web sufiiciently to compensate 9 for a retardation in the rate oftravel of the chains.

In the present instance the block 36 is mounted loosely upon the shaftor red 15.

To hold such block and the guide 35 which is carried thereby fromdisplacement by swinging transversely, the block is provided with a. pin361 projecting through a hole in an arm 362 that is made fast by meansofa set-screw 363 upon the shaft or red 15-. The pin slides through thehole in the arm in the relative movements of the parts taking place inthe direction of the length of the machine, but remains at all times inengagement with the arm so as to prevent the block 36 and guide 35 fromswinging transversely as aforesaid; The same mode of operation andresults are secured in the case of the pin 20 carried by the swingingsupport 13, and the arm 19 in the'slot of which the said pin 20 isreceived. The pin 20 remains at all times in engagement with the arm 19while the mov ing or traveling carrier 7 moves forward and backwardlengthwise of the machine.

It is important to maintain substantial uniformity in the tension of thecloth as it passes to the detector-roll 8 and from the latter by way ofthe intermediate or traveling carriers to the chains. I thereforeprovide power-driven feed-rolls by means of which the web is supplied tothe detectorroll, etc., at a rate of speed properly correlated with therate of movement of the chains. A pair of such feed-rolls is shown at37, 38, the web passing between them,

and from such pair the web passes to and partly around a guide andtension roll 39,

' from which last the web passes to and partly around the detector-roll8. The feed-rolls 37, 38, and if desired the roll 39 also, may

a be driven by any convenient means.

The

drawings show the feed-roll 37 positively driven and the roll 38 drivenby frictional contact therefrom. The driving of the roll 37 is effectedby means of a sprocket-wheel 40 which is fixed to the same, and asprocketchain 41, the latter passing partly around and being driven by asprocket-wheel 42,

1 part of the machine.

Fig. 1, upon a rotating shaft 43 in the lower The same sprocketchain,41, is employed for rotating the detector-roll 8, it passing partlyaround a sprocket-wheel 4a which is fixed upon one end of the'shaft 11of the said detector-roll. In a great variety of machines in whichwebsof cloth are handled, it is important that the selvages or marginsshould be fiat and open, and not curled or doubled over.

There is a great tendency to doubling and curling over of the selvagesor margins of a f web which is being fed into a machine, or 1 which istraveling through the latter. This has necessitated in many casesheretofore .the constant attention of one or two operators to a machineto keep watch upon the selvages or margins and open or straighten themout. It has also compelled a lower rate of speed inthe working ofmachines than would otherwise be attainable. In accordance with oneportion of the invention I provide devices for opening out the selvagesor margins of a traveling web so that they shall'travel forward in afiat and open condition.

These devices are arranged to act at points inward of the edges of theweb with a tendency to draw the marginal or selvage portions of the webtoward the middle of thewidth of the latter, while at the same time theweb is subjected to longitudinal j tension or strain tending to extendin a straight longitudinal line each portlon of the web at and adjacentthe selvages or margins. By communicating to the web a positive pullinward toward the middle of its Width, while the web'at and near itsselvages or margins is-maintained in a stateof lon- 'gitudinal tension,any wrinkles which lie between the iii-pulling devices and a selvagewords, the intermediate portion or body of l the web is pulled-inwardlyaway from the selvage-portions or margins, and thereby the latter areopened and flattened out.

I have herein shown this portion of the invention reduced to practice byapplying the in-pulling devices to the web intermediate the guide andtension-pulley 39 and the detector-roll 8. The web extends in a straightline and in a taut condition from one of these rolls to the otherthereof. Two sets of devices are employed, one set arranged toward oneside of the middle of the path of travel of the web, and the other setarranged toward the other side of the said middle. Each set comprises inthe drawings two members 45, 45, located at one surface of the web, anda member 4-6 located at the other surface thereof. The member i6 entersbetween and interlaps with the two members l5, 45, so that the Web isbent and deflected by member 46 between the two members l5, 4-5. Thistends to strain the web transversely, operating to draw theside-portions thereof i11- wardly toward themiddle of the path of theweb. The three members also are inclined relative to the length of theweb so that they operate with a tendency to guide the side-portions ofthe web transversely inward. The members 45, L5, are composed of bars orstrips disposed side by side and carried by an arm 4:7 rising fromsleeve 10, and the member 4:6 consists of a revolubledisk that isjournaled upona support 48 attached to a bracket 49 that is also carriedby the arm 47. The support 48 is hung upon the said bracket by means ofa pivotal bolt 50, upon which it is adjustable to vary the extent towhich the peripheral portion of the member 46 enters betaveen the twomembers i5, 45, the support being secured in the desired position ofadjustment by tightening up the said bolt and its nut. It will beperceived that the width of the web as it passes onward from theinpulling devices is less than its width as it approaches such devices.The in-pulling devices, in consequence of being supported upon thesleeves of the detector-roll, are automatically adjusted through theaction of the detector-roll so as thereby to be maintained in properrelations with the respective selvages or marginal portions of the web.

The operator or attendant whose duty it is to keep watch over the clothas it passes into the machine stands 'or sits a little to the right inF 1. To assist in keeping the web in substantially the required path,side-guides 51 are provided at each side of the machine. Each of theseguides is mounted upon a support 52, which in turn is mounted upon thetransversely-extending fixed tube 21. The support 52 is movable alongthe said tube transversely of the machine. Arms 53, 53, extending fromthe supports 52 carry flanged rolls 54, 54. The cylindrical bodies ofthese rolls are intended to make rolling contact with the end-portionsof the cylindrical. periphery of the detectorroll 8. The flanges of thesaid rolls 54, 54, are intended to engage with the ends of the body ofthe detector-roll. The supports 52 normally occupy positions in whichthle', flanges of the rolls 54, 54, engage with the corresponding end01' the said body. This determines the position of each support 52 andof the guide 51 extending from such support. The support may be moved byhand into such position, or the supports 52, 52, at the opposite sidesof the machine may be connected by a contracting spiral spring 521tending to draw them together, and acting to automatically keep theflanges of rolls 54, 54, engaged as stated. hen the detector-roll S isextended in length, in manner which is clearly indicated in the LettersPatent to which reference has previously been made herein, the outwardmovement of the respective ends of the detector-roll, through theengagement of such ends with the flanges of the rolls 54, 54, shifts thesupports 52 outwardly, carrying outward the guides 51. lVhen thedetector-roll. is reduced in length, the supports 52 either are movedinward by hand, or, in case the spring 521 is employed, areautomatically shifted by means of such spring. The guides 51 aredesigned chiefly to serve as visual gages or indi-- cators to show theproper path for the respective selvages or margins of the web as thelatter travels toward the machine, and, when pins are employed asedge-guides upon. the front-rail (not shown) over which the web passeson its way into the machine, such guides 51 serve the operator in propory locating the said pins.

I claim as my invention:

1. In combination, tentering devices for the opposite selvage-portionsor margins 01 a web, reciprocating oppositely with respect to eachother, carriers around which the cloth passes on its way to saidtentering devices, and supports for said carriers movable to permit thelatter to conform to the movements of the tentering devices and take upslack in the respective selvage or marginal portions of the web as theyare received by the said tentering devices.

2. In combination, tentering devices reciprocating oppositely withrespect to each other while carrying the web onward, and devices movablebodily forward and back in unison with the respective sets of tenteringdevices for obviating slack in the respective selvage or marginalportions of the web as they are received by the said tentering devices,and means for compensating for the recurrent acceleration andretardation of the onward movement of the tentering devices and web.

3. In combination, tentering devices reciprocating oppositely withrespect to each other while also carrying the web forward,

moving or traveling web-carriers maintaining the respectiveselvage-portions or margins of the web free from slackness anddelivering them to the said tentering devices, and web-selvage or margindetecting devices which automatically adjust said webcarriers to theoncoming portions of the said selvage-portions or margins.

4. In combination, tentering devices reciprocating oppositely withrespect to each other while also carrying the web onward, moving ortraveling web-carriers maintaining the respective selvage-portions ormargins of the web free from slackness and delivering them to the saidtentering devices, web selvage or margin detecting devices whichautomatically adjust said web-carriers to the oncoming portions of thesaid selvage-portions or margins, and means for compensating for therecurrent acceleration and retardation of the onward movement of thetentering devices and web.

5. In combination, selvage -detecting means, separate moving ortraveling carriers for the respective selvages or margins of a web, andtransversely swinging supports for the said carriers operativelycontrolled by the said detecting means to adjust the receiving portionsof the said carriers to correspond with the oncoming portions of theselvages or margins.

6. In combination, selvagedetecting means, moving or traveling carriersreceiving the respective selvages or margins of a web and delivering thesame at predetermined points, and transversely swinging supports for thesaid carriers operatively controlled by the said detecting means toadjust the receiving portions or the said carriers to correspond withthe oncoming portions of the selvages or margins.

7. In combination, selvagedetecting means, moving or traveling carriersindependent of each other receiving the respective selvages or marginsof a web, and transversely movable carriersupports adjacent therespective selvages or margins, operatively controlled by the saiddetecting means to correspond with the oncoming portions of the selvagesor margins.

8. In combination, means, rotating carrier-wheels for the re spectiveselvages or margins of a web, and transversely movable carrier-supportson which said carrier-wheels are mounted to rotate, operativelycontrolled by the said detecting means and'thereby adjusted tocorrespond with the oncoming portions of the selvages or margins.

9. In. combination, selvage-detecting means, rotating carrier-wheels forthe respective selvages or margins of a web, and transversely swingingcarrier-supports on which said carrier-wheels are mounted to rotate,operatively combined with the detectselvage detecting mg means andthereby. adjusted to correspond with the oncoming portions of theselvages or margins.

v 10. The combination with the selvage-ca-rriers of an elastic tenter,having alternating movements, of bodily-movable automatic guidesdelivering to said carriers, and operating through such bodily movementto compensate for the said alternating movement tion and retardation ofthe forward travel of the respective selvage-portions.

12. In combination, a. vlbrating .tenter,

' bodily-movable carriers delivering the sel vage-portions' or marginsof a web to the tentering devices, means for yieldingly actuating saidcarriers for taking up slack in the web as the tenter .vibrates, andmeans for V compensating for the alternating acceleration andretardation of the tenter-chains as the tenter vibrates.

1 3. In combination, a vibrating tenter, means for automatlcally guidingthe selvageportions or margins of a web to the tenterchams, includingcarriers. dellvermg sald selvage-portionsor margins to the tentermgdevices, means for actuating said carriers to take-up slack in the webas the tenter vibrates, and means for compensating for the alternatingacceleration and retardation of the tenter-chains as the tentervibrates.

14. In a web-handling machine, means operating to produce longitudinaltension in a traveling web, and means acting upon an intermediateportion of the width of the web with a tendency to pull theside-portions of the web inwardly, to thereby flatten out the selvage ormarginal portions.

j 1 5. In a web-handling machine, means opcrating to produce longitudmaltension on a traveling Web at and adjacent a selvage or margin thereof,and pulling-in means acting inward of the said selvage or margin andoperating to open and flatten, out the said selvage or margin. 7 V i r16. In combination, a selvage-opener and flattener, a'selvage-detector,and a selvagecarrier, the said opener and flattener and the said carrieroperatively controlled by the said detector and automatically adjustedthereby to suitthe position of the selvage.

17 In web-handling devices, a. selvageopener and flattener actingto drawa sideportion of a web inwardly and to guide the web into narrowerwidth.

18. In web-handling devices, the combination with means which produce alongitudinal tension in a traveling web, of a selvagefia-ttenercomprising a pair of members at one surface of the web and anintermediately located member at the other snrface of the web whichdeflects the web between the members first named.

19. In a web-handling machine, the com bination with automatic guidingdevices ineluding a selvage-detector, oi carrier-means automaticallyadjusted under control of said selvage-detector, and means receiving theweb from said carrier-means, of positivelydriven feed-rolls for the webat the supplyside of the selvage-detector.

20. In combination, the detector-roll, a traveling carrier to which theweb proceeds from the detector-roll, a mo able support for said carrier,means by which the said detector-roll automatically adjusts the saidsupport to thereby adjust the carrier to suit the position of theselvage, and means for independently adjusting the carrier transverselyto vary its relation to the selvage.

21. In combination, a longitudinally adjustable detector-roll, aside-guide for the entering web, and means in connection with suchside-guide engaging an end-portion of the detector-roll to define theposition of the side-guide.

22. In combination, selvage-deteeting means, traveling carriers for therespective selvages or margins of a web, definitely controlling the sameuntil the delivery thereof to the means for receiving the said selvagesfrom the said carriers, said carriers automatically adjusted to the saidselvages or margins under the control of the said selvage-detectingmeans, and the said receiving means.

523. In combination, selvage detecting means, a travelingselvage-carrier wheel, and means controlled by said detecting means forbringing the receiving portion of the rim of said carrier wheelautomatically into predetermined relations with the selvage of the web,compensating thereby for variations in the line of travel of the saidselvage.

In testimony whereof I afiiX my signature in presence of two witnesses.

WILLARD I. LEWIS.

Witnesses:

CHAS. F. RANDALL, NATHAN B. DAY.

Cuties of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, D. C.

